Beating-machine for paper-pulp.



A. J.`- WEIS. BEATINGVMACHINE FOR PA'PEB PULP.

APPLICAHON HLED NOV; 12. 1917.

Patente Aim 22,1919.

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htrnanw a. Wars, or Darren, onto.

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To all 'whom 't may camera:

Be 'it lmown that l, Annnnw J. Wars, a

citizen of the United States, residing at Dayton, in the county of Montgomery and `State of Ohio, have invented certain new and usetul lmprovenents in Beating-Machines for Paper-Pult), of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to heating machines for paper pulp, and discloses a machine ,of the Hollander type. been employed for many years and they comprisea roll provided with a number of knives or bars,` this beatin which has parallel bars, generally placed at an angle to the aXis of the beater roll. The roll rotates over'the bedplate, so that the knives in the roll may pass over the bars of the bed-plate whereby to disintegrate the fibers of the material operated. on.

The knives or bars in the beater roll (sometimes called fly-bars) are subjected. to considerablc pressure and,th.erefore, wear grad ually and so must be replaced or adjusted. In some machines of the prior art the knivcs have been so held on the roll as to make their detachinent therefrom Very difficult. One method of fastening the knives to the roll has been to form slits in the ends of the kn'ives, these knives being carred between radial ribs on the heating roll. A metal band was then heated and shrunlr on the roll, it passing through the slits in the knives. While this made a rigid fastening, it was Very troublesome to withdraw the shrunlr band, but such an operation was necessary each time a single knifeneeded adjustment or replacement.

l`he present invention aims to improve the method of :tastening the knives or bars on the beater roll, by providing clamping devices associated with one or two hnives only and adapted to hold the knives rig'idly in their proper position on the roll. Thus to replace a knife it is necessary only to release the clamp for the particular knife, whereupon the knife may be readily readjusted or replaced. The tightening of the clamp again holds the knife fast to the roll. No' release or displacement of the other knives is caused.

In the preferred form shown in the drawings, the clamp is of a wedge form and serves to force the knives positively to engagement with the radial ribs of the beater roll. Thiis Such machines have roll being positioned I specification of !Letters Patent. Patenta@ Apr., 22. UE LL application filed November m, 1917. ser-11111330. Qeh .tw. I

it not only holds the knives in proper position, but also forces them positively to that proper position. a

In the drawings, Figures 1 to 3 show the preferred form, Fig. 1 being an' end elevation of a beater roll and its bed-plate; Fig

.2, a fragmentary vertical longitudinal section of one end of the roll; and Fig. 3, a vertcal detail in section of part of the end of the roll; Figs. 4; and 5 are `fragmentary details in vertical section showing different modified forms of clamping devices.

The drawings show three methods and the preferrecl form shown in Figs. l to 3 will be first described. The ordinary beater roll l enployed in the art is used in this invention. lt will be understood that the roll forms generally a cylinder in its shape, being oo mposed of two end plates or wheels, and in some cases having a central stiiening plate. The entire roll is not shown in the drawings, as it is well known in the art. The ends of the roll 'comprise central portions 2 and peripheral rings 3, the rings and central portions being connected by a depressed fiange The three portions of the wheel, narnely, the central portion 2, the flange 4 and the ring' 3, are shown as being integral and they may -be cast as a unit. Also integral with the wheel are ribs 5 projecting radially from the ring portion 3 and spaced apart, as shown in Fig. l. Between each two adjacent ribs 5 are monnted a pair of knives or bars 6, these being sometimes -terned 'fly-bars in the art. It will be understood that while these ele ments '8 are'referred to in the specification and claims as knives, nevertheless generally they are not brought to a sharp Operating edge. `fhe action 1s more a scraping action than a cntting action, and the operative edges are left somewhat blunt, as shown in all the figures. As shown in Fig. 3 the pairs of knives 6 between any two adjacent ribs 5 are held to place and pressed against these ribs by a wedge 7.' Fastened to this wedge is a screw 8 (lFig. 2) having threads which are engaged by a nut 9. As indicated in Fig. 2 the ring portion 3 of the wheel is pierced to permit the passage therethrough of the screw 8 and the nut 9 is inside the ring portion, room to turn the nut being provided by the position of the depressed filange 4.

Fig. 1 shows the bed 10 and the bed-plates 11 used in the heating machine, but these need not be described particularly. The plates 11 may be arranged at an angle to the 4 shaft 12 of the beater roll, if desired, and

that is frequently done in the art. To prevent the liquid from entering the 'cutout portion surrounded by the depressed flange 4 and the peripheral ring 3, a plate 13 may be employed, held against the side of the roll in any desired manner.

Tt will be seen that each pair of knives 6 is held and clamped in position by an independent Wedge 7 and the operation of insertingthe knives consists merely in placing them between the ribs 5 and in then tghtening the wedge 7 between them by means of the screw 8 and the nut 9. The radial movement of the wedge, of course, forces the knives 6 tightly against the ribs 5, and it will be observed that the edges of the ribs are nearly radial from the center of shaft 12 of the beater roll. The knives 6 rest directly on the peripheral ring between the ribs 5 and so are held rigidly in proper and exact position.

In order to replace or readjust one of the knives 6, the corresponding wedge 7 is released by operation of the nut 9, whereupon the knife may be withdrawn so as to permit the insertion of another or it may be sharpened and then replaced.

It will be observed that this Construction well accomplishes the object first stated, in that it provides for readly detaching and then replacing or readjusting any of the knives, and in any case only two knives are released by the operation of any one wedge 7. This is obviously much Simpler and quicker to accomplish than to release a shrunk band holding all the knives on the beater roll, and then to perform whatever operation of replacing a knife is necessary.

It will, of course, be understood that as usual in the art the beater roli is provided with a similar wheel 2 at its other end, having similar wedges 7 and the other parts, the knives 6 extending across to the other end of the roll and being there clamped in a similar manner. Ordinarily a block of wood fitting between each pair of knives 6 is employed, this block of wood extending substantially from one end of the roll to the other. Such blocks of wood being common in the art and no part of this invention, are not shown.

In the modified form of Fig. 4 the same general constructon of wheel' is employed, having a circular central portion 2 and depressed flange 4 and a peripheral ring 3' In this case the ribs 5* are spaced apart a i distance which permits insertion of only one knife 6 between each two adjacent ribs. A lamp 8 is rovded, passing through a hole n the perip eral ring 3 and a nut 9 serves to tighten the. clamp, which, in this case, passes into a notch 14 in the knife 6 In this Construction each knife is provided with a separate clamp and, therefore, it is necessary to release only one knife in order to make adjustments thereof. The operation is obvious from the description and drawing and consists merely in tig tening the nut 9% thereby 'moving the 'clamp 8 toward the center 12 of the beater roll and thus forcng the knife 6 to proper position against the peripheral ring 3 and to the bottom of the notch or cut between each two ad acent ribs 5:

In the form shown in Fig. 5, the peripheral ring 3 is provided with ribs and like the form of Fig. i, these are spaced apart to permit the insertion of one knife 6 only. The clamp 8 passes through notches 14: in' two adjacent knives and is tightened in the same manner as in the other forms. Thus in the form of Fig. 5 release of two adjacent knives 6 is required to adjust either one of the two, but the remaining knives of the beater roll remain in "attached condition and are not disturbed.

It will be seen that in all three of the forms there is provided the peripheral ring and the depressed fiange, thus permitting a screw (nr bolt to pass through the peripheral ring and allowing room to tiglten the nut in front of the depressed flange. Oeration of the screws in each case serves to knives radially of the wheel until they rest on the bottom of the notches between the ribs of the peripheral ring In the form of Figs. 1 to 3 there is the'additional advantage that the lmives are not required to fit closely the spaces between the rbs, but the wedge 7 provides means for forcing these knives directly against the sides of the ribs and thus less exactness in' the Construction 'of the ribsand the spaces between them is required.

Fig. 3 shows a form of fastening for the wedges 7 alternative to the form of Fig. 2. In Fig. 3, a bolt 8 passes through each Wedge 7, the bolt ending in an elongated rounded head 8 which is held in the enlarged end of a hole 7 passing through `the wedge 7. The operation of this bolt 8 is the same as that of the screw 8.

It Will be. observed that the form of knfe in- Figs. 1 to 3 difers slightly from the form of Figs. 4 and 5. In the preferred form the sides of the knives are straight and inclined to each other, thus makin the knives symmetrcal. Therefore, the ives are usable on either right handed or left handed rolls, and thus are an improvement on the forms of knife of Figs. 4 and 5 which can onlybe used to face in one way on the roll.

Having thus fully described my 'invention, what I claim as new, and desr'e to secure by Letters Patent, is

1. In a pulp beater, the combination, with a wheel having a central portion, and a peripheral ring portion connected with the portion spaced apart to form a substantially rectangnlar shaped space therebetween, two

lmives between each two adjacent ribs, a

wedge between said two knives and pressing said knives against said ribs, and means passing through the peripheral ring and operable to force 'said wedge toward said ring.

2. In a pulp beater, the combination, with a wheel; ?mailing a central circular portion, and a peripheral ring portion., connected with the central portion by a depressed fiange, of radial ribs integral of said ring portion, the outer surfaces of said ribs being nearly' radial from the center of said wheel, the faces' of said ribs opposite each other being substantially parallel to a radial plane therebetween, two knives between each two adjacent ribs, a wedge between said knives and constructed to force said knives against said ribs, a screw fast to said wedge and passing through said ring portion and in front ot said depressed flange, with means for draw said screw toward the center of said wheel, thereby forcing the wedge to operative position 3. ln a pulp beater, the combination, with a wheel cast to form a circilar central portion, depressed fiange extending radially, and` a perpheral ring portion, ext/ending ax- .ially, said. central portion, said depressed flange and said ring. portion being integral with each other, of radially extending ribs cast integrally of said ring portion and having substantially rectangnlar shaped spaces therebetween, knives between said ribs projecting radially and resting on the outside of said ring portion, wedges for said knives for holding them tightly against said ring portion, and means passing through said ring portion for forcing said wedges toward the center of said wheel.

In testimony whereof, l a my signature.

ANDEW J. WVEl-S. 

